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Commit | Line | Data |
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5230f605 NTND |
1 | /* |
2 | ** Do shell-style pattern matching for ?, \, [], and * characters. | |
3 | ** It is 8bit clean. | |
4 | ** | |
5 | ** Written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986. | |
6 | ** Rich $alz is now <rsalz@bbn.com>. | |
7 | ** | |
8 | ** Modified by Wayne Davison to special-case '/' matching, to make '**' | |
9 | ** work differently than '*', and to fix the character-class code. | |
10 | */ | |
11 | ||
b73ecb48 | 12 | #include "git-compat-util.h" |
feabcc17 NTND |
13 | #include "wildmatch.h" |
14 | ||
15 | typedef unsigned char uchar; | |
5230f605 | 16 | |
91b81b64 PW |
17 | /* Internal return values */ |
18 | #define WM_ABORT_ALL -1 | |
19 | #define WM_ABORT_TO_STARSTAR -2 | |
20 | ||
5230f605 NTND |
21 | /* What character marks an inverted character class? */ |
22 | #define NEGATE_CLASS '!' | |
23 | #define NEGATE_CLASS2 '^' | |
24 | ||
5230f605 NTND |
25 | #define CC_EQ(class, len, litmatch) ((len) == sizeof (litmatch)-1 \ |
26 | && *(class) == *(litmatch) \ | |
27 | && strncmp((char*)class, litmatch, len) == 0) | |
28 | ||
29 | #if defined STDC_HEADERS || !defined isascii | |
30 | # define ISASCII(c) 1 | |
31 | #else | |
32 | # define ISASCII(c) isascii(c) | |
33 | #endif | |
34 | ||
35 | #ifdef isblank | |
36 | # define ISBLANK(c) (ISASCII(c) && isblank(c)) | |
37 | #else | |
38 | # define ISBLANK(c) ((c) == ' ' || (c) == '\t') | |
39 | #endif | |
40 | ||
41 | #ifdef isgraph | |
42 | # define ISGRAPH(c) (ISASCII(c) && isgraph(c)) | |
43 | #else | |
44 | # define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c)) | |
45 | #endif | |
46 | ||
47 | #define ISPRINT(c) (ISASCII(c) && isprint(c)) | |
48 | #define ISDIGIT(c) (ISASCII(c) && isdigit(c)) | |
49 | #define ISALNUM(c) (ISASCII(c) && isalnum(c)) | |
50 | #define ISALPHA(c) (ISASCII(c) && isalpha(c)) | |
51 | #define ISCNTRL(c) (ISASCII(c) && iscntrl(c)) | |
52 | #define ISLOWER(c) (ISASCII(c) && islower(c)) | |
53 | #define ISPUNCT(c) (ISASCII(c) && ispunct(c)) | |
54 | #define ISSPACE(c) (ISASCII(c) && isspace(c)) | |
55 | #define ISUPPER(c) (ISASCII(c) && isupper(c)) | |
56 | #define ISXDIGIT(c) (ISASCII(c) && isxdigit(c)) | |
57 | ||
b0e02876 | 58 | /* Match pattern "p" against "text" */ |
0c528168 | 59 | static int dowild(const uchar *p, const uchar *text, unsigned int flags) |
5230f605 | 60 | { |
327f2f3e | 61 | uchar p_ch; |
3a078dec | 62 | const uchar *pattern = p; |
5230f605 | 63 | |
327f2f3e | 64 | for ( ; (p_ch = *p) != '\0'; text++, p++) { |
b6a3d335 | 65 | int matched, match_slash, negated; |
327f2f3e NTND |
66 | uchar t_ch, prev_ch; |
67 | if ((t_ch = *text) == '\0' && p_ch != '*') | |
9b3497ca | 68 | return WM_ABORT_ALL; |
0c528168 | 69 | if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) |
327f2f3e | 70 | t_ch = tolower(t_ch); |
0c528168 | 71 | if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) |
164bf83a | 72 | p_ch = tolower(p_ch); |
327f2f3e NTND |
73 | switch (p_ch) { |
74 | case '\\': | |
75 | /* Literal match with following character. Note that the test | |
76 | * in "default" handles the p[1] == '\0' failure case. */ | |
5230f605 | 77 | p_ch = *++p; |
327f2f3e NTND |
78 | /* FALLTHROUGH */ |
79 | default: | |
80 | if (t_ch != p_ch) | |
9b3497ca | 81 | return WM_NOMATCH; |
327f2f3e NTND |
82 | continue; |
83 | case '?': | |
84 | /* Match anything but '/'. */ | |
c41244e7 | 85 | if ((flags & WM_PATHNAME) && t_ch == '/') |
9b3497ca | 86 | return WM_NOMATCH; |
5230f605 | 87 | continue; |
327f2f3e NTND |
88 | case '*': |
89 | if (*++p == '*') { | |
81b26f8f | 90 | const uchar *prev_p = p; |
327f2f3e | 91 | while (*++p == '*') {} |
c41244e7 NTND |
92 | if (!(flags & WM_PATHNAME)) |
93 | /* without WM_PATHNAME, '*' == '**' */ | |
94 | match_slash = 1; | |
81b26f8f | 95 | else if ((prev_p - pattern < 2 || *(prev_p - 2) == '/') && |
40bbee0a NTND |
96 | (*p == '\0' || *p == '/' || |
97 | (p[0] == '\\' && p[1] == '/'))) { | |
4c251e5c NTND |
98 | /* |
99 | * Assuming we already match 'foo/' and are at | |
100 | * <star star slash>, just assume it matches | |
101 | * nothing and go ahead match the rest of the | |
102 | * pattern with the remaining string. This | |
103 | * helps make foo/<*><*>/bar (<> because | |
104 | * otherwise it breaks C comment syntax) match | |
105 | * both foo/bar and foo/a/bar. | |
106 | */ | |
107 | if (p[0] == '/' && | |
0c528168 | 108 | dowild(p + 1, text, flags) == WM_MATCH) |
9b3497ca NTND |
109 | return WM_MATCH; |
110 | match_slash = 1; | |
e5bbe09e NTND |
111 | } else /* WM_PATHNAME is set */ |
112 | match_slash = 0; | |
327f2f3e | 113 | } else |
c41244e7 NTND |
114 | /* without WM_PATHNAME, '*' == '**' */ |
115 | match_slash = flags & WM_PATHNAME ? 0 : 1; | |
327f2f3e NTND |
116 | if (*p == '\0') { |
117 | /* Trailing "**" matches everything. Trailing "*" matches | |
118 | * only if there are no more slash characters. */ | |
b6a3d335 | 119 | if (!match_slash) { |
afe8a907 | 120 | if (strchr((char *)text, '/')) |
1f2e05f0 | 121 | return WM_ABORT_TO_STARSTAR; |
327f2f3e | 122 | } |
9b3497ca | 123 | return WM_MATCH; |
46983441 NTND |
124 | } else if (!match_slash && *p == '/') { |
125 | /* | |
126 | * _one_ asterisk followed by a slash | |
127 | * with WM_PATHNAME matches the next | |
128 | * directory | |
129 | */ | |
130 | const char *slash = strchr((char*)text, '/'); | |
131 | if (!slash) | |
1f2e05f0 | 132 | return WM_ABORT_ALL; |
46983441 NTND |
133 | text = (const uchar*)slash; |
134 | /* the slash is consumed by the top-level for loop */ | |
135 | break; | |
327f2f3e NTND |
136 | } |
137 | while (1) { | |
138 | if (t_ch == '\0') | |
139 | break; | |
6f1a31f0 NTND |
140 | /* |
141 | * Try to advance faster when an asterisk is | |
142 | * followed by a literal. We know in this case | |
832c0e5e | 143 | * that the string before the literal |
6f1a31f0 NTND |
144 | * must belong to "*". |
145 | * If match_slash is false, do not look past | |
146 | * the first slash as it cannot belong to '*'. | |
147 | */ | |
148 | if (!is_glob_special(*p)) { | |
149 | p_ch = *p; | |
150 | if ((flags & WM_CASEFOLD) && ISUPPER(p_ch)) | |
151 | p_ch = tolower(p_ch); | |
152 | while ((t_ch = *text) != '\0' && | |
153 | (match_slash || t_ch != '/')) { | |
154 | if ((flags & WM_CASEFOLD) && ISUPPER(t_ch)) | |
155 | t_ch = tolower(t_ch); | |
156 | if (t_ch == p_ch) | |
157 | break; | |
158 | text++; | |
159 | } | |
1f2e05f0 PW |
160 | if (t_ch != p_ch) { |
161 | if (match_slash) | |
162 | return WM_ABORT_ALL; | |
163 | else | |
164 | return WM_ABORT_TO_STARSTAR; | |
165 | } | |
6f1a31f0 | 166 | } |
0c528168 | 167 | if ((matched = dowild(p, text, flags)) != WM_NOMATCH) { |
9b3497ca | 168 | if (!match_slash || matched != WM_ABORT_TO_STARSTAR) |
327f2f3e | 169 | return matched; |
b6a3d335 | 170 | } else if (!match_slash && t_ch == '/') |
9b3497ca | 171 | return WM_ABORT_TO_STARSTAR; |
327f2f3e NTND |
172 | t_ch = *++text; |
173 | } | |
9b3497ca | 174 | return WM_ABORT_ALL; |
327f2f3e NTND |
175 | case '[': |
176 | p_ch = *++p; | |
177 | #ifdef NEGATE_CLASS2 | |
178 | if (p_ch == NEGATE_CLASS2) | |
179 | p_ch = NEGATE_CLASS; | |
180 | #endif | |
9b3497ca NTND |
181 | /* Assign literal 1/0 because of "matched" comparison. */ |
182 | negated = p_ch == NEGATE_CLASS ? 1 : 0; | |
b6a3d335 | 183 | if (negated) { |
327f2f3e NTND |
184 | /* Inverted character class. */ |
185 | p_ch = *++p; | |
186 | } | |
187 | prev_ch = 0; | |
9b3497ca | 188 | matched = 0; |
327f2f3e NTND |
189 | do { |
190 | if (!p_ch) | |
9b3497ca | 191 | return WM_ABORT_ALL; |
327f2f3e NTND |
192 | if (p_ch == '\\') { |
193 | p_ch = *++p; | |
194 | if (!p_ch) | |
9b3497ca | 195 | return WM_ABORT_ALL; |
327f2f3e | 196 | if (t_ch == p_ch) |
9b3497ca | 197 | matched = 1; |
327f2f3e NTND |
198 | } else if (p_ch == '-' && prev_ch && p[1] && p[1] != ']') { |
199 | p_ch = *++p; | |
200 | if (p_ch == '\\') { | |
201 | p_ch = *++p; | |
202 | if (!p_ch) | |
9b3497ca | 203 | return WM_ABORT_ALL; |
327f2f3e NTND |
204 | } |
205 | if (t_ch <= p_ch && t_ch >= prev_ch) | |
9b3497ca | 206 | matched = 1; |
b79c0c37 AR |
207 | else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) { |
208 | uchar t_ch_upper = toupper(t_ch); | |
209 | if (t_ch_upper <= p_ch && t_ch_upper >= prev_ch) | |
210 | matched = 1; | |
211 | } | |
327f2f3e NTND |
212 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
213 | } else if (p_ch == '[' && p[1] == ':') { | |
214 | const uchar *s; | |
215 | int i; | |
216 | for (s = p += 2; (p_ch = *p) && p_ch != ']'; p++) {} /*SHARED ITERATOR*/ | |
217 | if (!p_ch) | |
9b3497ca | 218 | return WM_ABORT_ALL; |
327f2f3e NTND |
219 | i = p - s - 1; |
220 | if (i < 0 || p[-1] != ':') { | |
221 | /* Didn't find ":]", so treat like a normal set. */ | |
222 | p = s - 2; | |
223 | p_ch = '['; | |
224 | if (t_ch == p_ch) | |
9b3497ca | 225 | matched = 1; |
327f2f3e NTND |
226 | continue; |
227 | } | |
228 | if (CC_EQ(s,i, "alnum")) { | |
229 | if (ISALNUM(t_ch)) | |
9b3497ca | 230 | matched = 1; |
327f2f3e NTND |
231 | } else if (CC_EQ(s,i, "alpha")) { |
232 | if (ISALPHA(t_ch)) | |
9b3497ca | 233 | matched = 1; |
327f2f3e NTND |
234 | } else if (CC_EQ(s,i, "blank")) { |
235 | if (ISBLANK(t_ch)) | |
9b3497ca | 236 | matched = 1; |
327f2f3e NTND |
237 | } else if (CC_EQ(s,i, "cntrl")) { |
238 | if (ISCNTRL(t_ch)) | |
9b3497ca | 239 | matched = 1; |
327f2f3e NTND |
240 | } else if (CC_EQ(s,i, "digit")) { |
241 | if (ISDIGIT(t_ch)) | |
9b3497ca | 242 | matched = 1; |
327f2f3e NTND |
243 | } else if (CC_EQ(s,i, "graph")) { |
244 | if (ISGRAPH(t_ch)) | |
9b3497ca | 245 | matched = 1; |
327f2f3e NTND |
246 | } else if (CC_EQ(s,i, "lower")) { |
247 | if (ISLOWER(t_ch)) | |
9b3497ca | 248 | matched = 1; |
327f2f3e NTND |
249 | } else if (CC_EQ(s,i, "print")) { |
250 | if (ISPRINT(t_ch)) | |
9b3497ca | 251 | matched = 1; |
327f2f3e NTND |
252 | } else if (CC_EQ(s,i, "punct")) { |
253 | if (ISPUNCT(t_ch)) | |
9b3497ca | 254 | matched = 1; |
327f2f3e NTND |
255 | } else if (CC_EQ(s,i, "space")) { |
256 | if (ISSPACE(t_ch)) | |
9b3497ca | 257 | matched = 1; |
327f2f3e NTND |
258 | } else if (CC_EQ(s,i, "upper")) { |
259 | if (ISUPPER(t_ch)) | |
9b3497ca | 260 | matched = 1; |
b79c0c37 AR |
261 | else if ((flags & WM_CASEFOLD) && ISLOWER(t_ch)) |
262 | matched = 1; | |
327f2f3e NTND |
263 | } else if (CC_EQ(s,i, "xdigit")) { |
264 | if (ISXDIGIT(t_ch)) | |
9b3497ca | 265 | matched = 1; |
327f2f3e | 266 | } else /* malformed [:class:] string */ |
9b3497ca | 267 | return WM_ABORT_ALL; |
327f2f3e NTND |
268 | p_ch = 0; /* This makes "prev_ch" get set to 0. */ |
269 | } else if (t_ch == p_ch) | |
9b3497ca | 270 | matched = 1; |
327f2f3e | 271 | } while (prev_ch = p_ch, (p_ch = *++p) != ']'); |
c41244e7 NTND |
272 | if (matched == negated || |
273 | ((flags & WM_PATHNAME) && t_ch == '/')) | |
9b3497ca | 274 | return WM_NOMATCH; |
327f2f3e NTND |
275 | continue; |
276 | } | |
5230f605 | 277 | } |
5230f605 | 278 | |
9b3497ca | 279 | return *text ? WM_NOMATCH : WM_MATCH; |
5230f605 NTND |
280 | } |
281 | ||
282 | /* Match the "pattern" against the "text" string. */ | |
55d34269 | 283 | int wildmatch(const char *pattern, const char *text, unsigned int flags) |
5230f605 | 284 | { |
91b81b64 PW |
285 | int res = dowild((const uchar*)pattern, (const uchar*)text, flags); |
286 | return res == WM_MATCH ? WM_MATCH : WM_NOMATCH; | |
5230f605 | 287 | } |